Add Splunk Hec receiver (#422)

pkg/collector/parser/receiver_generic_test.go

@@ -78,6 +78,7 @@ func TestDownstreamParsers(t *testing.T) {
 		{"fluentforward", "fluentforward", "__fluentforward", 8006, parser.NewFluentForwardReceiverParser},
 		{"statsd", "statsd", "__statsd", 8125, parser.NewStatsdReceiverParser},
 		{"influxdb", "influxdb", "__influxdb", 8086, parser.NewInfluxdbReceiverParser},
+		{"splunk-hec", "splunk-hec", "__splunk_hec", 8088, parser.NewSplunkHecReceiverParser},
 	} {
 		t.Run(tt.receiverName, func(t *testing.T) {
 			t.Run("builds successfully", func(t *testing.T) {

pkg/collector/parser/receiver_splunk-hec.go

@@ -0,0 +1,34 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package parser
+
+import "github.com/go-logr/logr"
+
+const parserNameSplunkHec = "__splunk_hec"
+
+// NewSplunkHecReceiverParser builds a new parser for Splunk Hec receivers, from the contrib repository.
+func NewSplunkHecReceiverParser(logger logr.Logger, name string, config map[interface{}]interface{}) ReceiverParser {
+	return &GenericReceiver{
+		logger:      logger,
+		name:        name,
+		config:      config,
+		defaultPort: 8088,
+		parserName:  parserNameSplunkHec,
+	}
+}
+
+func init() {
+	Register("splunk_hec", NewSplunkHecReceiverParser)
+}

pkg/collector/parser/receiver_splunk-hec_test.go

@@ -0,0 +1,17 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package parser
+
+// all tests for the Splunk Hec parser are currently part of the test TestDownstreamParsers